heap minchild

hpp

#ifndef heap_hpp
#define heap_hpp

#include <stdio.h>
#include <iostream>
#include <cassert>
using namespace std;

class heap {

  int parent(int i) { return (i - 1) / 2; }
  int left(int i) { return 2 * i + 1; }
  int right(int i) { return 2 * i + 2; }

  int n; // capacidad
  int s; // tamaño

  int *a; // arreglo

public:

  heap(int);
  ~heap();

void ins(int);
int tout();
int minChild(int);

int capacity() const { return n; }
int size() const { return s; }

bool empty() const { return s == 0; }
bool full() const { return s == n; }

void print();
};

#endif /* stack_hpp */

cpp

#include "heap.hpp"

  heap::heap(int c){

    n = c;
    s = 0;

    a = new int[n];
  }

  heap::~heap(){

    delete[] a;
  }

 void heap::ins(int x){

   assert(!full());

  a[s] = x;
  int i = s++;
   while (i > 0 && a[i] > a[parent(i)]) {
     int c = a[i];
     a[i] = a[parent(i)];
     a[parent(i)] = c;

     i = parent(i);
   }

 }

int heap::tout(){
  assert(!empty());

  int x = a[0];
  int i = 0;
  a[0] = a[--s];
  while (i <= parent(s-1) && a[i] > a[minChild(i)]){

    int m = minChild(i);
    int c = a[i];
    a[i] = a[m];
    a[m] = c;
    i = m;
  }

    return x;
}

int heap::minChild(int i) {

  assert(i <= parent(s-1));

  if (right(i) > s-1) return left(i);
  if (a[left(i)] > a[right(i)]) { return left(i); }
  else return right(i);

}

void heap::print(){

  cout << "[ ";
  for (int i = 0; i < s; i++) cout << a[i] <<" ";
  cout << "]\n";
}

main

#include <iostream>
#include "heap.hpp"

int main() {

  srand((unsigned) time(nullptr));

  int n = 100;

  heap m(n);

  for (int i = 0; i < 10; i++){

    int x = rand() % n + 1;

    cout << "Agregar " << x << ": ";

    m.ins(x);
    m.print();
  }

  cout << "\n\n";
  m.print();
  cout << "\n\n";
  for (int i = 0; i < 10; i++){

    cout << "Extraer " << m.tout() << ": ";

    m.print();
  }

}